I'm not trying to be a jerk here, so please try to take this at face value.
You sound like someone who is trying to emulate what you see "stars" wear on TV. People like musicians, athletes, actors at awards shows. If that's how you want to dress, more power to you, but you are not going to find much to support you here on this site. The zeitgeist of this site and its membership tends towards a more classical style of dress. Don't confuse that with formality or an overreliance on suits - sportcoats and trousers are well-loved here, but in more conservative, classical, less fashion-oriented modes.
That's not to say there aren't trends on here. That's not to say there isn't some form of groupthink. And even then, no one opinion encapsulates the forum. But there is general agreement on some concepts. I think that, in general, grey shirts, grey shoes, and grey belts are probably relatively unanimously unloved. Spend some time in the "what are you wearing today" thread to see the sorts of outfits that are loved on here. Maybe you'll look at them and think "what a bunch of bores these guys are." Which is your prerogative to think, of course, but then you should also realize that these guys aren't going to be your best source of help given the style you seem to want to pursue. Or perhaps you'll think "hm, that is different than what I have conceived of as good dress, but there's something to it. Let me stick around for a while." And you'll slowly learn, as most of us have. There are some really fantastic dressers on here and most of us slowly learned, or are still learning, how to do what they do. Or maybe you'll love it from the start, who knows.
SF is about good tailoring, great quality, wearing things that fit, and classic, relatively timeless combinations over flashiness and trends. It's almost decidedly not about peacocking with bright colors or dramatic elements. It's about standing out by having something almost sublimely classic, standing out by not standing out.
That may not be for you. You have to decide.
Specific criticisms of what you've proposed:
Charcoal as a sportcoat is difficult. Is it solid, or patterned? Weight? Material? Sheen? Your most basic classic sportcoat will always be the navy blazer, and as you start out wanting nice clothes, you'll find it's the ultimate piece of clothing. When you start, you'll make a lot of mistakes trying to get something amazing that will blow the ladies away, but over time, as you mature with this hobby, should you choose to accept it, you'll realize simple navy, well-tailored, perhaps with details you like, is the way you should have gone in the first place.
The charcoal SC also limits your potential trouser matchings, but white sounds atrocious to me. If you must stick with it, though it's probably not totally SF-approved, I'd go with a white shirt, well-fitting black trousers, and black shoes and belt, white square, simple fold. It will be monochromatic, sort of the look you're going for, but much more elegant.
Buy a decent pair of shoes. Not zooty ones. Maybe just a pair of Allen Edmonds Park Avenues. And a good linen square. White button-down oxford. Make sure everything fits.
Have fun, good luck.